One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,9,12,10,8,16,18)(7,13,14,17,15,20,19,11)(21,22)(23,29)(24,26)(25,33)(27,31)(28,32)(30,36)(34,35)(1,2)(3,4)(5,7,10,15)(6,11,8,17)(9,19,16,14)(12,20,18,13)(22,26)(27,35)(28,33)(29,36)(2,4)(21,23,24,30)(22,27,26,35)(25,34,32,31)(28,36,33,29)(5,8,10,6)(7,13,15,20)(9,12,16,18)(11,19,17,14)(22,28)(25,32)(26,33)(27,36)(29,35)(31,34)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.